Development and Validation of a Radiomics Nomogram for Identifying Invasiveness of Pulmonary Adenocarcinomas Appearing as Subcentimeter Ground-glass Opacity Nodules

Publication date: Available online 22 January 2019Source: European Journal of RadiologyAuthor(s): Wei Zhao, Ya’nan Xu, Zhiming Yang, Yingli Sun, Cheng Li, Liang Jin, Pan Gao, Wenjie He, Peijun Wang, Hongli Shi, Yanqing Hua, Ming LiAbstractThe aim of the present study was to develop and validate a radiomics-based nomogram for differentiation of pre-invasive lesions from invasive lesions that appearing as ground-glass opacity nodules (GGNs) ≤10 mm (sub-centimeter) in diameter at CT. A total of 542 consecutive patients with 626 pathologically confirmed pulmonary subcentimeter GGNs were retrospectively studied from October 2011 to September 2017. All the GGNs were divided into a training set (n = 334) and a validation set (n = 292). Researchers extracted 475 radiomics features from the plain CT images; a radiomics signature was constructed with the least absolute shrinkage and selection operator (LASSO) based on multivariable regression in the training set. Based on the multivariable logistic regression model, a radiomics nomogram was developed in the training set. The performance of the nomogram was evaluated with respect to its calibration, discrimination, and clinical-utility and this was assessed in the validation set. The constructed radiomics signature, which consisted of 15 radiomics features, was significantly associated with the invasiveness of subcentimeter GGNs (P < 0.0001 for both training set and validation set). To build the nomogram model, rad...
Source: European Journal of Radiology - Category: Radiology Source Type: research